WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-users

Re: [Xen-users] VT-x not found..

To: Bart Coninckx <bart.coninckx@xxxxxxxxxx>, Xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] VT-x not found..
From: Jonathan Tripathy <jonnyt@xxxxxxxxxxx>
Date: Tue, 01 Jun 2010 00:43:15 +0100
Cc:
Delivery-date: Mon, 31 May 2010 16:44:29 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <4C041A8F.4000801@xxxxxxxxxxx>
List-help: <mailto:xen-users-request@lists.xensource.com?subject=help>
List-id: Xen user discussion <xen-users.lists.xensource.com>
List-post: <mailto:xen-users@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=unsubscribe>
References: <4C03F943.8000302@xxxxxxxxxxx> <201005312145.44369.bart.coninckx@xxxxxxxxxx> <4C04151C.8090806@xxxxxxxxxxx> <201005312223.23348.bart.coninckx@xxxxxxxxxx> <4C041A8F.4000801@xxxxxxxxxxx>
Sender: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.9) Gecko/20100423 Thunderbird/3.0.4

On 31/05/10 21:22, Jonathan Tripathy wrote:

On 31/05/10 21:23, Bart Coninckx wrote:
On Monday 31 May 2010 21:59:24 Jonathan Tripathy wrote:
Jonathan Tripathy
I.T. Solutions Manager
ABPNI Computer Solutions Ltd.
Registered Address:
Emerson House, Belfast, BT8 8DN
Tel: +44 (0)800 11 234 28
Web: www.abpni.com
Registered in N. Ireland No. 602753

This email and any attachments to it may be confidential
and are intended solely for the use of the individual to
whom it is addressed. Any views or opinions expressed are
solely those of the author and do not necessarily represent
those of ABPNI Computer Solutions Ltd. If you are not the
intended recipient of this email, you must neither take any
action based upon its contents, nor copy or show it to anyone.
Please contact the sender if you believe you have received
this email in error.

On 31/05/10 20:45, Bart Coninckx wrote:
On Monday 31 May 2010 21:42:20 Jonathan Tripathy wrote:
On 31/05/10 20:42, Bart Coninckx wrote:
On Monday 31 May 2010 20:24:15 Jonathan Tripathy wrote:
On 31/05/10 19:11, Rudi Ahlers wrote:
On Mon, May 31, 2010 at 8:00 PM, Jonathan Tripathy<jonnyt@xxxxxxxxxxx
<mailto:jonnyt@xxxxxxxxxxx>>    wrote:

       Hi Everyone,

       I upgraded my CentOS 5.5 to Xen 3.4.2 using this guide:

http://www.syntaxtechnology.com/2010/01/upgrade-xen-3-0-on-centos-5-4
-x 86 _64-to-xen-3-4-2/

Now, using the new kernel that it gave me, the system doesn't
seem to be able to detect vt-x..

       In virt-manager, Local Install Media and Network Boot are
greyed out..

       Any ideas?

       Thanks

       _______________________________________________
       Xen-users mailing list

Xen-users@xxxxxxxxxxxxxxxxxxx<mailto:Xen-users@xxxxxxxxxxxxxxxxxxx>
http://lists.xensource.com/xen-users


Doe your CPU acrtually support vt-x?


Website: http://www.SoftDux.com
Technical Blog: http://Blog.SoftDux.com
Office: 087 805 9573
Cell: 082 554 7532
Yes it does. It worked fine with the orignal version of Xen that came with CentOS 5.5. It's a brand new server opened today from Dell which
support Vt-x and Vt-d. Virtualisation technology is enabled in the
BIOS
You have the vmx flag in /proc/cpuinfo?
I suppose you had the VT extension enabled before the migration but
suppose you fiddled with it, power down your host (like shutdown and
pull the plug) and power it up again. I experienced this being
necessary once because simple rebooting after getting out of the BIOS
did NOT enable VT for real.

B.
Nope, I don't have that flag in cpuinfo, but I can't understand why....
Is it possible that the kernel upgrade can disable this somehow??

It's really confusing me
I personally think not. Do the power recycle thing and check again. If
you're sure it's on in the BIOS. Ow yes, which reminds me, I once had a
BIOS where it needed to be enabled on two different spots - I think it
was a HP machine.
Power cycling made no different. I had the plug out for about 2 or 3
minutes.

This is really starting to worry me why the vmx flag isn't showing...

I never checked for the vmx flag in the vanilla install, but since I was
able to create an HVM guest, I image it would have been there?

I can't imagine this is a result of the kernel being used. Whatever is in /proc/cpuinfo is what Linux reads out of the BIOS. Something is wrong there.

Hmm I just threw in a Ubuntu live CD there and vmx is showing....
Something must be dud in that Xen 3.4.2 source that i downloaded...

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users

Ok this is starting to bug me...

I installed Ubuntu 10.04 onto my server. I then spent a couple of hours compiling and installing Xen 4.0. Now yet again, vmx has disappeared from /proc/cpuinfo!!!!

Xend isn't working correctly, but that's another issue, so I can't really test any HVM guests.

Buggy BIOS??

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users

<Prev in Thread] Current Thread [Next in Thread>